diff options
| author | Frank Li <Frank.Li@freescale.com> | 2009-12-18 15:34:12 +0800 |
|---|---|---|
| committer | Justin Waters <justin.waters@timesys.com> | 2010-03-25 14:01:51 -0400 |
| commit | 63f52db9dd185ef1a6804abd57b92110be9f7c65 (patch) | |
| tree | 97f3d89b76c9980896249f8ca3f09d8071e23249 | |
| parent | 74ad99a8a423bcf8e5877458f1c2166ebea2fa78 (diff) | |
ENGR00119296 Fix iMX23 display abnormal when change frequency
Miss clear BYPASS_CPU bit for CLKSEQ. CPU and HClk frequency will low than
24Mhz, so there are not enough bandwidth to support LCD refresh
Signed-off-by: Frank Li <Frank.Li@freescale.com>
| -rw-r--r-- | arch/arm/plat-stmp3xxx/clock.c | 3 | ||||
| -rw-r--r-- | drivers/video/stmp37xxfb.c | 4 |
2 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/plat-stmp3xxx/clock.c b/arch/arm/plat-stmp3xxx/clock.c index ec286741d185..62823d08f3f1 100644 --- a/arch/arm/plat-stmp3xxx/clock.c +++ b/arch/arm/plat-stmp3xxx/clock.c @@ -578,6 +578,9 @@ static int clkseq_set_parent(struct clk *clk, struct clk *parent) REGS_CLKCTRL_BASE + HW_CLKCTRL_CPU); hclk.rate = 0; } + + __raw_writel(1 << clk->bypass_shift, + clk->bypass_reg + shift); } else __raw_writel(1 << clk->bypass_shift, clk->bypass_reg + shift); diff --git a/drivers/video/stmp37xxfb.c b/drivers/video/stmp37xxfb.c index 07cbb27352e8..ff9e2d03722d 100644 --- a/drivers/video/stmp37xxfb.c +++ b/drivers/video/stmp37xxfb.c @@ -654,13 +654,13 @@ static int stmp3xxxfb_notifier(struct notifier_block *self, /* REVISIT */ switch (phase) { case CPUFREQ_PRECHANGE: - if (old_state == F_ENABLE) + if (old_state == F_ENABLE || old_state == F_STARTUP) if (pentry->blank_panel) pentry->blank_panel(FB_BLANK_POWERDOWN); break; case CPUFREQ_POSTCHANGE: - if (old_state == F_ENABLE) + if (old_state == F_ENABLE || old_state == F_STARTUP) if (pentry->blank_panel) pentry->blank_panel(FB_BLANK_UNBLANK); break; |